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Correlation between spirometric indices and the area of collagen positive staining in the subepithelial area standardized for total subepithelial area (A/Tot A) in control, and COPD subjects.
Note: There is an inverse correlation between obstructive spirometric indices and subepithelial collagen deposition.
Abbreviations: COPD, chronic obstructive pulmonary disease; FEV1, forced expiratory volume in the first second; % pred, % predicted; FVC, forced vital capacity.
